Improvement in stone-channeling machines



iltiii machine ready for operation;

nnnnznn e. LAMSON, orl WiNDso-Rgvnnnon'r.'

Lamis Patent No. 110,376, dma December 2o, 1,810,-

iMPRovEMENfr in sToNE-QHANNELING MACHINES,

'lne Schedule referred to in these Letters I ntent and makin Pilt of the ionic.

To all' whom it 'mag/concom.-

Beit known thatI, Ennafnznn G. LAMSON, of

Windsor, in the county .of Windsor and State of Vermont, have invented vcertain Improvements in Stonev .r Channeling Machines, of whiclithe following is a specification, reference being hadto the accompanying drawing. l

`My invention 'relates toniachines for channeling or cutting stone in quarries; and

' lThe .invention consists in certain improvement-s in the nijechanism,'the various details of which are here-A inafter more fully explained.

Figure 1 represents a side elevation ofA rn` y improved Figure 2 is a rear elevation of the saine with a portion oi the supporting and guiding-frame removed and Figures v3, 4, 5, (i, 7 8, 9, and 10, represent portions of 'the saine, shown more in detail, for the purpose of more .fully illustrating their construction.

The' general character of this machine, andpthe inannerof supporting-and opera-ting it, is the saine as that described in the'application tiled by F. C.A

'Ireadwell and'myself jointly, and consists, in general terms, of a frame carrying an operating engine and cutteis'or chisels, which is. mounted on a track that is supported in au upright or inclined position on the rock, andv along which track the engine propels the machine as itoperates to cnt a Ichannel vor, groove, the peculiar character and features of which are more i especially describedin the application liereinbefore Y alluded to, and to which reference is madev for a more detailed description thereof.

.Iii'tliis machine the invention 'has reference inore especially to the ni'annei of holding, adjusting, and

operating the cutters or chisels; in means for adjustingthe crank oi" wrist-pin for varying or regulating the 1ength of the stroke; and in the method or means of feeding the machine to and fro along the track.

The construction of the track, and the manner of constructing and mounting the machine thereon, having been fully described in the jointapplication to vwhich previous reference has been already made, I

will now proceed to point out the special features of the variousimprovementsembodied in this machine. r It has generally been customaryinniachines of this kindto mount the cutter-harto which the cutters are attacliedb'y` cla-inpsfso as to run upon guide-bars sc curedptothe standard or upright partof the frame,

' AvIn this machine I dispense with these guidebars en` til-ely, and instead I run the cntter-baivH between four stationary guides, G, which project from the front side of the upright frame, these guides being arranged two above and two below, as shownin side iii ,pairs, l elevation in g. 1, each pair of guides being secured edge, as shown to or forming projecting arni's of a single bracket, as

shown in iig. 3, the edges of the cutter-bar H sliding in. grooves cut for it in the inner sides ,of lthese arms; or, vif preferred, lthe grooves may be formed in the edges of the cutter-bar, thebi'ackets having corresponding projections to tittherein.

Ihe drills or 'cutters K are' secured to the cutterhar H in the following manner:

I provide a clamp, which consists `of a plate, I, and

a face-plate, N, held together by bolts andnuts.

The' plate I has its tace recessed to receivethe up- I per end of the cutters, as showninig. 6, there being a portionof themetal leftabove, and on each side ot" the recess in which the ,drills are set, the strip u across 'the upper edge ofthe plate'I serving as an abutment against whichthe upper ends of the cutters restto prevent theni from sliding zup, and the strips ons the sides serving to hold the cutters together sidewisc, and between which they are held tightly by awedge, lli/,inserted from above and along side of the-cutters, as shown in tig. 6.

'lo prevent the cutters from being pulled out of the o clamp, tlierecess in theJ plate I is v,made inclined, that is, it is 'made deeper at the upper than at the lower on the rear side of the' cutters, I place a ,series of wedges, i, one. for each critter, these wedges having theirface next to the cutters serrated so that they will take hold on the cutter and-be drawndowu along with the latter incase they tend to pull out.

It will thus he seen that if the cutters Ystartte work .out they will only be wedged the tighter 'by-means of the wedges c' being drawn down into the narrower space toward thc bottom 'of the clanip. In this way theV cutters are inade self-tightening downward, and, as tliey are prevented from working up by the ledge u at their upper end, they are heid very securely iu A place.

' 'Io-enable `the operator' to adjust the cutters with greater facility than has heretofore been possible, I secure this clamp that holds the'cn'tteis to the cutterbar'H by meansc.` a bolt, I), which passes through an, hole in the center of the clamp and through a slot-in 1 'thc cutter-bar, this slot extending lengthwise nearlyl `the whole length of the bar H, along -its center, as

in section in tig. 5'; and in this space,

end of the cutter-bar, permanently', a guide, J, which .consists simply of a bar arranged transversely across the footl of the cutter-banand having uitsface recesses in which the cutters slide freely as they are raised or lowered by adjusting the clamp.

If desired, a har may he'seeured to this guide J, across the front face of the cutters; but in practice I do not -nd this necessary.

In order to get room for the cential'holt E the cutters K are arranged in two-sets, with a space between them, as represented in iig. d, and this space is filled in the clamp by a loose har or block, g, which has holes for the 'passage of the bolt i? and also the clamping-bolts lat the center of the clamp lengthwise, these holes being made larger thanA the body of the bolts, so that the block g may be moved sidewjise, ,and thus permit the single wedge hito wedge allthe drills rmlyj against the ledge on the opposite side of the clamp.

It is obvious that' by using another wedge on the other side this central .block g may 'ne 'made v stationary, but I prei'en the foregoing plan, for the reason that it permits the cutters to be secured iirmly against the-solid ledge on the side and across the top oi' plate I, whereby they are held more accurately in line with the cutter-bar, andare less liable to work loose.

' By'this method ci' constructing the cutter-har and clamp it will be seen thatthecutters can be adjusted by simply loosening thenuton the single bolt P and letting the clamp with the cutters drop down, or by raising them up, as may be desired, and `tillen. tighten-- ing up the bolt again; This can ,be done ina very brief space of time, and as the cutters have to be adjusted asoftenas they have cutrthree'or four` inches indepth, and as these machines are intended -to cut grooves l'om four' vto seven feet deep, this facility. of adjustm'ei'lt becomes very importanh In machines for cutting channels in stone of this. character it is very necessary to have some means of adjusting the stroke of the cutters or chisels;v that it to say, to give a harder or light-erstroke, according to. the'quality and texturejofthe stone which is to be cut. .In my former patents I have shov'gu an adjustable crank or.wrist-piu for lthis purpose, but I have now devised' a means of accomplishing this change or adjustment, .which I find to he 'superior'. to -my previousinventions for that purpose.

j lhe adjustable crank is shown in perspective in. iig. 7, audin section in iig. 8. f

'The body ofthe Vcrank U has a T-shaped groove formed longitudinally in it, as shown in lig. 7, and the outer'face of the crank is serrated transversely.

A bolt, t, is formed with a rect-angular head, tov tit and slide in the groove of the clank, and over this holt is fitted a sleeve, "W, which has at its base a dat plate orprojectin'g flange, the under side of which is serrated to correspond with the sel-rations on the face of the crank U, as represented in-g's. 7 Aand 8..

The head of the bolt t beinginserted in the' groove of ,the crank, the sleeve .W is slipped on, the bolt and. sleeve moved'to the requiredv .position -on the crank, where it is secured by means ofa nut, v, screwed onto the outer end of the bolt, thus' locking the partslirmly together. By this means the length of the strokecau be varied atwill, and the adjustment, like that 'of the cutters, can be made by loosening a single nut, and in a very .brief spaceof time.v

Where the wrist-pin is att-ached directly to the nalance-wheel, as is sometimes desirable, and as is represented in fig. 1, I modify the plan or means of adjustment, as shown'in'iigs. 9 and 10, 'In' g.10, which is a perspective view of a portion of the wheel D, there is reprs'euted a rectangular rccut in to the face'of the viheel. at or near the cen-- te r,'from` which .there extends a-slot or groove radi- `sprocket-chain, T, as shownin tig.'2.

Ihis chain also passes over and engages with aally, this groove being out underv on each side so as tp' naar@ sides tc engage in the undercut portions ol' the groove,

is inserted in theI recess and slid along into theslot.

Apollar, "W, is then slipped over the protruding stem ofthe pin, anden this collar the elastic pit-man is pivoted, a nutbeing screwed onto the end of the pin .againstthe outer end of the coliar, which presses the inner end of the collar against theface of the wheel, on each side of the slot, and at the same time drawing the flanged head of the wrist-pin tight againstthe under side of the projecting lips of the groove, and thereby locking the 'wrist-pinfirmly in place.

Asa meausof adjusting the wrist-pin, and to assist in holding it from slipping in theslot, I place a screw-rod in the slot in such a position that it passes through-the head oi' the wrist-pin or bolt, the ends of this screw-roll having bearings in the wheel D.

By loosening the nut .on .the end of the wrist-pinand turning this screw, the wrist-piu can be mpved to. or from the center of the wheel, and thus the stroke canbe lcngthencd or shortened at will. i

(For the purpose oi'. feeding the machine along ou the track I secure on the side of each of the'hearingwheels V a grooved wheel, i, around which passes a sprocket-wheel, o', located between the bearing-Wheels,

`which sprocket-wheel carries on its :ide a bevel-gear wheel, e', to which motion is imparted by a bevel-wheel, f, mounted on' the lower end of a rod, p', which is driven by connection with the main shaft O of the engine, as shown in fig. I. 4

@n the same shaft with the wheel eis mounted. another wheel,` c, (see iig. 2,) and a sliding clutch, c, ou the shaft, serves to engage' the shaft with either of the wheels c or e', and thus to turn the sprocket-wheel 'and the chain T in one or thel other direction at will.

0n the lower rail A. ofthe truck or frame. is located, at suitable intervals, a seriesof forked studs, I1, so arranged that the chain T will engage in them, andthus, as the chain is moved, it takes hold on thesespurs, and thus feeds the machine along.

./.ftteach-endv of the vrail is located a stud or pin, R," as shown in tig. 2, and the fork that moves the clutch c is secured to a lever, d, which is 'pivotcd at its ceuter, and'so arranged that, as the machine approaches the end of the track, the lever will strike against 'the stud It, and thus automatically changethe clutch and reverse the-feed, thus causing the machine to reverse its movement and travel in the opposite direction.

By these means the machine can be kept traveling,v

back and'forth'the length of the track, without stopping 4the operationof the cutters, until it becomes necessary/to adjust the cutters, which as previously explained, can be done in a very brief` period.

Bythese various improvements I am able to pro- 'duce'a very superiorlnachine; onethat is much lighter 4 thauthose generally used, that can be adjusted in much less time, and in which the stroke can bereadily varied," as desired, and 4the cutters letdown Ato the extreme lower end of the cutter-har, thereby cutting to.,

a muclrgreatcr depth with the same length of cutters than any similar machine heretofore made.

' It should be observed that the adjustable crank and' the manner of mountingthc cutter-bar, and of securing the cutters to thejclamp, and also the adjusting of the cutters op the cutter-bar, are allequall y applicable to the' various machines heretofore patented to me, as well as other machines of this character. A

Havin thus fully' described :ny-invention,

3 '.1. Aclamp for Aholding the chsels or drills of a stone-channeling machiuerconsisting of the recessed plate I, provided ith the side and topledges u, and

the plate N, united toits face by bolts, thus forming a socket in which all the chisels or drills have a solid :bearing on their ends and sides, substantially :1s-demibed.m Y'

2. Infcombinatio'u with a clamp constructed as herein described, the serrated wedges i, arranged to lock the cbisels in tbeclalnp, as set forth.

3.- The slotted` cutterfba H, provided with serrations on its f.'1cein combination with a clamp -provided with corresponding senations, the saidbar and clamp being united bya bolt, substantially as described.

4. The adjustable crank, consisting of the slotted arm U, crank-pin t, and collar W, all constructed and operating substantially as described.

5.`The chain T, arranged on the machine inzsuch a manner that, .when motion is imparted to said chain by the operating mechanism, it shall engage with the studs b or equivalent devices attached to tbe su'pporty' 'ing railor frame, for the purpose ot feeding the machine along, substantially as described.

I. 6. The stationary guide J, secured to the lower end of the cutter-bar for holding and guiding the cutters, substantially as described.

-7. In combination with-the stops It, or tbeirequiva lents, the pivoted lever d, connected to the clutch c, for automatically shifting the feed-works and revers-A ing tue mot-ion or travel of the machine,'substautially -as described.

Witnesses:

W. C. DODGE, L.l W. HAWLEY. 

